Unsupport DebugActivity & EntryProvider in Settings.

Set SpaEnvironment (with Spp only) in SettingsApplication
Remove DebugActivity & EntryProvider from Settings.

Bug: 244122804
Test: manual - build Settings
Change-Id: I18e97c80b4f1d6094bb22cf28e7e84ea325869d7

src/com/android/settings/spa/SpaActivity.kt

@@ -20,7 +20,7 @@ import android.content.Context
 import android.content.Intent
 import com.android.settingslib.spa.framework.BrowseActivity
 
-class SpaActivity : BrowseActivity(SettingsSpaEnvironment) {
+class SpaActivity : BrowseActivity() {
     companion object {
         @JvmStatic
         fun startSpaActivity(context: Context, destination: String) {